#0  0x00007fffeffc4cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007fffeffc80d8 in __GI_abort () at abort.c:89
#2  0x00007ffff0001394 in __libc_message (do_abort=do_abort@entry=1,
    fmt=fmt@entry=0x7ffff010fb28 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#3  0x00007ffff000d66e in malloc_printerr (ptr=<optimized out>, str=0x7ffff010fc58 "double free or corruption (out)",
    action=1) at malloc.c:4996
#4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3840
#5  0x00007fff943068ca in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#6  0x00007fff943071f8 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#7  0x00007fff9430759f in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#8  0x00007fff94428e58 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#9  0x00007fff94429432 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#10 0x00007fff94305dec in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#11 0x00007fff94306fa5 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#12 0x00007fff9430759f in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#13 0x00007fff94428d8a in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#14 0x00007fff94429432 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#15 0x00007fff94305dec in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#16 0x00007fff94306fa5 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#17 0x00007fff9430759f in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#18 0x00007fff94307635 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#19 0x00007fff94425b87 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#20 0x00007fff94305dec in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#21 0x00007fff94306fa5 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#22 0x00007fff94304fe4 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#23 0x00007fff943056b0 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#24 0x00007fff943054c4 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#25 0x00007fff94305473 in ?? () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#26 0x00007fff94301d97 in Convlevel::configure(int, unsigned int, unsigned int, unsigned int, unsigned int) ()
   from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#27 0x00007fff943027b7 in Convproc::configure(unsigned int, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#28 0x00007fff943013ef in GxSimpleConvolver::configure(int, float*, unsigned int) () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#29 0x00007fff942d8067 in GxPluginMono::work(void*, LV2_Worker_Status (*)(void*, unsigned int, void const*), void*, unsigned int, void const*) () from /usr/lib/lv2/gx_amp.lv2/gx_amp.so
#30 0x00007ffff6bc59ed in ARDOUR::LV2Plugin::work (this=0x9129890, size=1, data=0x7fff6c001120)
    at ../libs/ardour/lv2_plugin.cc:1771
#31 0x00007ffff6bbc53d in ARDOUR::Worker::run (this=0x8203570) at ../libs/ardour/worker.cc:166
#32 0x00007ffff6bbcf94 in sigc::bound_mem_functor0<void, ARDOUR::Worker>::operator() (this=0x912bde8)
    at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1787
#33 0x00007ffff6bbceda in sigc::adaptor_functor<sigc::bound_mem_functor0<void, ARDOUR::Worker> >::operator() (this=0x912bde0)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#34 0x00007ffff6bbcdaf in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, ARDOUR::Worker>, void>::call_it (
    rep=0x912bdb0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#35 0x00007ffff49e711d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#36 0x00007ffff42b4f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007ffff1636182 in start_thread (arg=0x7fff5bfff700) at pthread_create.c:312
#38 0x00007ffff008847d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111